Nice kata. Perhaps it was just me, but I think I've solved easier 2-3kyus lol. Suprised at the difficulty.

very nice kata

fixed

IDK about edge case coverage, but out-of-bounds coordinates are still reported as "TypeError: result.forEach is not a function".

kata updated, let's see if there are still some issues remaining

This line of code
if (iterable[i] != iterable[i+1]) res.push(iterable[i]);

can result on out of bounds

C Translation (author inactive).

fixed

Fixed.

Test description specifies that you are "Given a non-empty array of integers"
However there can be a random test for [] which expects 1 as a result.

comparison of two strings

so what? it's supposed to do so